Breast pump



FIG. 1 is a top, front, left perspective view of a breast pump in accordance with my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 2.

The broken lines represent portions of the breast pump in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a breast pump, as shown and described. 